First thing first. Windows XP Professional and Windows XP MCE are two entirely separate versions of Windows, so either you've got both of them installed on the same laptop (on separate partitions - dual boot), or you are a little confused and you only have one of them.
With reference to Windows XP MCE in particular, it's irrelevant which year version it is as you can update it to incorporate the new features (if any) via Windows Update. In any event, Windows XP MCE is only avilable to system builders for pre-installing on a new PC. In most places, you can't buy Windows XP MCE on it's own over the counter to install yourself, and if you could it would be a waste of your money since you already have it and the updates are free anyway.
Edited by pip22, 02 March 2007 - 02:24 PM.